Glaucoma is a condition that causes damage to your eye's optic nerve and gets worse over time. Fortunately, several new therapies in glaucoma are finally beginning to move from the laboratory to the clinic for human testing. Some of these are directed at preventing retinal ganglion cell and optic nerve degeneration, called “neuroprotection,” others at regrowing retinal ganglion cell axons down the optic nerve towards the brain, termed “regeneration”, and still others at replacing retinal ganglion cells altogether.